public class MethodDem016 {
    public static void main(String[] args) {
        test1();
    }

    public static void test1() {
        test2();
        System.out.println("test1");
    }

    public static void test2() {
        test3();
        System.out.println("test2");
    }

    public static void test3() {
        test4();
        System.out.println("test3");

    }

    public static void test4() {
        System.out.println("test4");


    }
}
